Global Patent Index - EP 0706641 B1

EP 0706641 B1 20031015 - MATERIAL LEVEL PROBE HAVING CRIMP SEAL

Title (en)

MATERIAL LEVEL PROBE HAVING CRIMP SEAL

Title (de)

MATERIALFÜLLSTANDSSENSOR MIT GEWELLTEM VERSCHLUSS

Title (fr)

SONDE DE NIVEAU DE MATIERE A JOINT D'ETANCHEITE SERTI

Publication

EP 0706641 B1 20031015 (EN)

Application

EP 94917495 A 19940531

Priority

  • US 9406053 W 19940531
  • US 7292593 A 19930607

Abstract (en)

[origin: US5307678A] A level measuring probe in which all potential leakage paths are closed by concentrically shrinking the outmost diametrical surface of the probe by some mechanical means such as a crimper or rotary swager to provide sufficient force to substantially uniformly deform the ground, guard, and active elements and insulators around the circumference of the probe such that multiple seals are created. A circumferential notch is preferably provided in the active probe element at the point of the crimping or swaging to provide "blowout protection" whereby the active probe electrode is held in place when used in a high pressure vessel. A pressure seal between the electrodes and insulation material is also maintained by using an elastomeric insulator which returns to its original shape after heating or a thin electrode which "gives" a little when the insulator expands radially during heating. The arrangement of the invention thus eliminates the need for costly machined parts and bushings to provide pressure seals.

IPC 1-7

G01F 23/26; H01G 5/012

IPC 8 full level

G01F 23/26 (2006.01)

CPC (source: EP US)

G01F 23/268 (2013.01 - EP); Y10T 29/43 (2015.01 - EP US); Y10T 29/49117 (2015.01 - EP US)

Designated contracting state (EPC)

DE FR GB NL

DOCDB simple family (publication)

US 5307678 A 19940503; CA 2164592 C 20001121; DE 69433241 D1 20031120; DE 69433241 T2 20040422; EP 0706641 A1 19960417; EP 0706641 A4 19980617; EP 0706641 B1 20031015; WO 9429678 A1 19941222

DOCDB simple family (application)

US 7292593 A 19930607; CA 2164592 A 19940531; DE 69433241 T 19940531; EP 94917495 A 19940531; US 9406053 W 19940531